280 PHYLLODY. 



It might at first be supposed that the same causes 

 that bring about the complete substitution of leaf-buds 

 for flower-buds (see Heterotaxy) would operate also in 

 the partial substitution of leaves for other parts of the 

 flower, but it will be seen that the inducing cause, 

 whether similar or not in the two cases respectively, 

 acts at different times; in the one case, it is not 

 brought into play until the rudiments of the flower 

 are already formed, whereas in the other the influence 

 is exerted prior to the formation of the flower. So 

 that while the formation of leaf-buds in place of flower- 

 buds may be and generally is due to an excess of 

 nutrition, inducing over activity of the vegetative 

 organs, the production of phyllomorphic or chloranthic 

 flowers may be owing rather to a perversion of deve- 

 lopment arising from injury or from some debilitating 

 agency. The discrepancies in the assigned causes for 

 the conditions above mentioned may, therefore, in 

 great measure, be attributed to the different periods 

 at which the causes in question operate. 



The follo^ving list may serve as a guide to the plants 

 most frequently the subjects of chloranthy, but refer- 

 ence should also be made to preceding and subsequent 

 sections, and to that relating to prolification of the 

 inflorescence. 



Aquilegia vulgaris. Selinum caruifolium. 



Chelidonium majus. Epilobium hirsutum ! 



Corydalis aurea. Begonia fuchsioides. 



NymphEa Lotus ! Gomphia, sp. 



Brassica oleracea ! Scabiosa Columbaria. 



Bunias. Dipsacus fullonum. 



Hesperis taatronalis. Matricaria Parthenium. 



Sinapis arvensis ! Calendula officinalis. 



Sisymbrium officinale. Campanula pyramidalis. 



Erucastinim canariense. B/eseda odorata ! 



Diplotaxis tenuifolia. Vitis vinifei*a. 



Lychnis dioica ! Dictamnus Fraxinella ! 



Cerastium glomeratum ! Triumfetta, sp. I 



triviale. *Tropffiolum majus ! 



Stellaria media. Rhamnus Frangula. 



Poterium pol^gamum. *Trifolium repens ! 



Torilis autbnscos. Lupinus, sp. 



Seseli, sp. Rosa diversifolia ! 



